On Tue, 19 Oct 2021 13:28:26 GMT, Aleksei Efimov <aefi...@openjdk.org> wrote:

>> This change implements a new service provider interface for host name and 
>> address resolution, so that java.net.InetAddress API can make use of 
>> resolvers other than the platform's built-in resolver.
>> 
>> The following API classes are added to `java.net.spi` package to facilitate 
>> this:
>> - `InetAddressResolverProvider` -  abstract class defining a service, and 
>> is, essentially, a factory for `InetAddressResolver` resolvers.
>> - `InetAddressResolverProvider.Configuration ` - an interface describing the 
>> platform's built-in configuration for resolution operations that could be 
>> used to bootstrap a resolver construction, or to implement partial 
>> delegation of lookup operations.
>> - `InetAddressResolver` - an interface that defines methods for the 
>> fundamental forward and reverse lookup operations.
>> - `InetAddressResolver.LookupPolicy` - a class whose instances describe the 
>> characteristics of one forward lookup operation.  
>> 
>> More details in [JEP-418](https://openjdk.java.net/jeps/418).
>> 
>> Testing: new and existing `tier1:tier3` tests
>
> Aleksei Efimov has updated the pull request incrementally with four 
> additional commits since the last revision:
> 
>  - Remove no longer used import from IPSupport
>  - Rename IPSupport.hasAddress and update it to use SocketChannel.open
>  - Address review comments: javadoc + code cleanup
>  - Address resolver bootstraping issue

Changes look good to me.

-------------

Marked as reviewed by dfuchs (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/5822

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